buy sterile vials and take the prop out of the amps and transfer it into the vials done i've heard of ppl doing that with there hcg but I have not so cant help you there it's just easier to leave it in the fridge and again the aromasin i'v used at 12.5 and been fine but every body is diff if you did start at 12.5 just monitor and adjust and you will know when you get your bloods